MRC stands for Memory Recall.
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Ah, the MRC button on a calculator is a handy little tool. It stands for Memory Recall, which means it brings back whatever number you stored in the calculator's memory. Simply press the MRC button after you've stored a number, and it will display that number for you to use in your calculations. Just like adding a happy little tree to your painting, the MRC button can add a touch of simplicity and convenience to your math equations.
All Clear
"C" = clear - pressing it sets all the calculations in the calculator back to zero.
s = Standard form.
Usually MC is Memory Clear.There will often also be:MR - Memory RecallM+ - Memory PlusIf you have a MRC button, then it is Memory Recall/Clear. Pressing it once will recall the memory; immediately pressing it a second time will recall the memory and clear it at the same time.